Which task should you run after changing the membership in security groups?

After changing the membership in security groups, it is essential to run the task to activate pending security policy changes. This task ensures that any modifications made to the security group memberships take effect. In a system like Workday, security policies govern access to sensitive information and functions. Therefore, activating pending changes is critical to maintaining the integrity of the access control system.

By activating these changes, the system processes the new access rights assigned to users within the updated security groups, ensuring that they can access the appropriate information and functionalities as intended. This step helps prevent any potential security gaps or unauthorized access that could arise if the changes were not implemented effectively.

The importance of this task cannot be understated, as it directly relates to maintaining proper security protocols within the organization. Other options, such as contacting HR for approval or rebooting the system, are not standard practices for managing security group changes and would not facilitate the immediate effects of those changes on user access.